Ni single atoms anchored on N-doped carbon nanosheets as bifunctional electrocatalysts for Urea-assisted rechargeable Zn-air batteries

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

3 Scopus Citations
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Author(s)

  • Hao Jiang
  • Jing Xia
  • Long Jiao
  • Xiangmin Meng
  • Pengfei Wang

Detail(s)

Original languageEnglish
Article number121352
Journal / PublicationApplied Catalysis B: Environmental
Volume310
Online published30 Mar 2022
Publication statusPublished - 5 Aug 2022

Abstract

The sluggish kinetics of oxygen electrode reactions is a bottleneck for the development of rechargeable Zn-air batteries (ZABs). Herein, we report a bifunctional electrocatalyst synthesized by anchoring individually dispersed Ni single atoms on N-doped carbon nanosheets (Ni SAs-NC), which exhibits an outstanding overall performance for oxygen reduction reaction (ORR) and urea oxidation reaction (UOR). Based on that, a conceptual urea-assisted rechargeable ZAB by coupling ORR with UOR of a low thermodynamic potential is demonstrated to have significantly decreased charging voltage and high urea elimination rate. The high bifunctional electrocatalytic activities of Ni SAs-NC endow the urea-assisted ZAB with a dramatically increased energy conversion efficiency of 71.8%, which is improved by 17.1% as compares with the conventional ZABs. The successful implementation of Ni SACs based urea-assisted rechargeable ZABs with an improved energy conversion efficiency may prompt ZAB technology towards practical applications.

Research Area(s)

  • Bifunctional activity, Oxygen reduction reaction, Single atom catalysts, Urea oxidation reaction, Zn-air batteries

Citation Format(s)

Ni single atoms anchored on N-doped carbon nanosheets as bifunctional electrocatalysts for Urea-assisted rechargeable Zn-air batteries. / Jiang, Hao; Xia, Jing; Jiao, Long; Meng, Xiangmin; Wang, Pengfei; Lee, Chun-Sing; Zhang, Wenjun.

In: Applied Catalysis B: Environmental, Vol. 310, 121352, 05.08.2022.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review